Utter fibs - time to be most dignified (10)

I believe the answer is:

stateliest

'most dignified' is the definition.
('stately' can be similar in meaning to 'dignified')

'utter fibs time' is the wordplay.
'utter' becomes 'state' (stating is a kind of uttering).
'fibs' becomes 'lies' (informal term for lies).
'time' becomes 't' (abbreviation).
'state'+'lies'+'t'='STATELIEST'

'to be' acts as a link.

I've seen this clue in The Daily Express.

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